I rated 1421's credibility pretty low from the introduction onwards - he talked about matching Chinese maps to how he'd seen things from seaports, which sounds

I rated 1421's credibility pretty low from the introduction onwards - he talked about matching Chinese maps to how he'd seen things from seaports, which sounds like a very easy way to see whatever you want to see, and some stuff about the same kind of chickens which felt like extremely thin evidence to hang extraordinary claims off of. I haven't got to GGS yet, but given that the top reddit "debunking" is pretty open that its main argument is "his conclusions are racist, therefore he mush be wrong", I'm feeling a little more hopeful.